TABLE 2.
The results of the IgG rec-ELISAs obtained with T. gondii recombinant antigens with sera positive in IgM ISAGA and/or IgA ISAGA (serum group II)a
| Serum group | No. of sera examined | No. (%) of positive sera
|
|||
|---|---|---|---|---|---|
| GRA7 | GRA1 | SAG1 | SAG1 + GRA7 + GRA1 | ||
| Subgroup A (IgM and/or IgA ISAGA positive, low or borderline avidity) | 72 | 69 (95.9)b | 60 (83.3) | 71 (98.6) | 72 (100) |
| Subgroup B (IgM and/or IgA ISAGA positive, high avidity) | 45 | 31 (68.9)b | 35 (77.8) | 45 (100) | 45 (100) |
| Total (IgM and/or IgA ISAGA positive, low or high avidity) | 117 | 100 (85.5) | 95 (81.2) | 116 (99.1) | 117 (100) |
| Negative control (IgG and IgM negative) | 19 | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
a
ISAGA, immunosorbent-agglutination assay.
b
χ2 = 16.1705, P < 0.001.